Just tried it and it works fine in singleplayer. Very amusing tool and it's surprisingly fun building up armor piece by piece.
:bravo:

However in multiplayer there were some bugs.
I tried unequipping armor pieces but other players could still see it.
Also the sprites often went away for some reason.

My suggestions:
Add a way to delete saved sets of armor ingame.
Add a prop browser with icons rather than having to look up the name and type it in manually.

Currently you can't unequip with the gui. You can type "lua_run_cl LocalPlayer():SetPACConfig{}" in your console to remove the outfit you're wearing from yourself though. And of course, you'll be able to delete outfits in future versions.

As for the finding models, just use the spawn menu to search for a prop, right click on the prop and select "Copy To Clipboard" and paste it into the model entry field.